#list {
    width: 77%;
    margin: auto;
    text-align: left;
    position: relative;
    top: 50px;
    overflow: hidden;
}

#list .list_user p {
    color: #666;
    font-size: 12px;
    padding-left: 10px;
    border-bottom: 2px solid #666;
    padding-top: 20px;
}

#list .list_user ul li {
    border-bottom: 1px solid #ccc;
    line-height: 30px;
    padding: 8px 0 8px 5px;
}

.list_user_li::after {
    display: block;
    clear: both;
    height: 100%;
    content: "";
    visibility: hidden;
}

#list .list_user ul li img {
    display: block;
    width: 26px;
    height: 26px;
    float: left;
    margin-right: 20px;
}

#list .list_user ul li span {
    display: block;
    height: 26px;
    line-height: 26px;
    font-size: 14px;
    float: left;
}

.list_index {
    position: fixed;
    height: 200px;
    overflow-y: scroll;
    list-style: none;
    padding-right: 10px;
    font-size: 20px;
    top: 50%;
    margin-top: -100px;
    right: 0;
}